MapDBitemSerializer.java

/**
 * Copyright (c) 2010-2016 by the respective copyright holders.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.openhab.persistence.mapdb.internal;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.io.Serializable;
import java.util.Date;

import org.mapdb.Serializer;
import org.openhab.core.library.types.DateTimeType;
import org.openhab.core.library.types.DecimalType;
import org.openhab.core.library.types.HSBType;
import org.openhab.core.library.types.OnOffType;
import org.openhab.core.library.types.OpenClosedType;
import org.openhab.core.library.types.PercentType;
import org.openhab.core.library.types.StringType;
import org.openhab.core.types.State;

/**
 * Serializer to serialize items to and from Mapdb format
 *
 * @author Jens Viebig
 * @since 1.7.0
 *
 */
public class MapDBitemSerializer implements Serializer<MapDBItem>, Serializable {

    private static final long serialVersionUID = 1L;

    public MapDBitemSerializer() {
    }

    @Override
    public void serialize(DataOutput out, MapDBItem item) throws IOException {
        out.writeUTF(item.getName());
        out.writeUTF(item.getState().getClass().getSimpleName());
        out.writeUTF(item.getState().toString());
        out.writeLong(item.getTimestamp().getTime());
    }

    @Override
    public MapDBItem deserialize(DataInput in, int available) throws IOException {
        MapDBItem item = new MapDBItem();
        item.setName(in.readUTF());
        String stateType = in.readUTF();

        String stateStr = in.readUTF();

        State state = null;

        if ("DecimalType".equals(stateType)) {
            state = DecimalType.valueOf(stateStr);
        } else if ("HSBType".equals(stateType)) {
            state = HSBType.valueOf(stateStr);
        } else if ("PercentType".equals(stateType)) {
            state = PercentType.valueOf(stateStr);
        } else if ("OnOffType".equals(stateType)) {
            state = OnOffType.valueOf(stateStr);
        } else if ("OpenClosedType".equals(stateType)) {
            state = OpenClosedType.valueOf(stateStr);
        } else if ("DateTimeType".equals(stateType)) {
            state = DateTimeType.valueOf(stateStr);
        } else {
            state = StringType.valueOf(stateStr);
        }

        item.setState(state);
        item.setTimestamp(new Date(in.readLong()));
        return item;
    }

    @Override
    public int fixedSize() {
        return -1;
    }

}